.le{

    background-color: #007bff;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;

}
.ri{

    background-color: red;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
}
.d1s{
    background-color: black;
}
